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Finding the Fourth Proportional to 328,611.60, 492,528.60 and 139,071.60

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Solution

The fourth proportional to 328,611.60, 492,528.60 and 139,071.60 is: 208,442.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,611.60 : 492,528.60 = 139,071.60 : x
  2. Step 2: Convert to fraction form
    328,611.60/492,528.60 = 139,071.60/x
  3. Step 3: Cross multiply
    328,611.60x = 492,528.60 × 139,071.60
  4. Step 4: Simplify right side
    328,611.60x = 68,496,740,447.76
  5. Step 5: Solve for x
    x = 68,496,740,447.76/328,611.60
  6. Step 6: Final answer
    x = 208,442.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.